On Sun, Jan 26, 2025 at 01:46:09PM +0000, Biju Das wrote:
> Enable SDHI1 on the RZ/G3E SMARC EVK platform using gpio regulator for
> voltage switching.
>
> Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> ---
> .../boot/dts/renesas/r9a09g047e57-smarc.dts | 65 +++++++++++++++++++
> .../boot/dts/renesas/renesas-smarc2.dtsi | 9 +++
> 2 files changed, 74 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
> index c063d47e2952..0e3d4ff31285 100644
> --- a/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
> +++ b/arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
> @@ -12,10 +12,40 @@
> #include "rzg3e-smarc-som.dtsi"
> #include "renesas-smarc2.dtsi"
>
> +/*
> + * To enable uSD card on SDIO_USD:
> + *
> + * Switch bank - SW_OPT_MUX-1 (SW_SDIO_M2E):
> + * 0 - SMARC SDIO signal is connected to uSD1
> + * 1 - SMARC SDIO signal is connected to M.2 Key E connector
> + */
> +
> / {
> model = "Renesas SMARC EVK version 2 based on r9a09g047e57";
> compatible = "renesas,smarc2-evk", "renesas,rzg3e-smarcm",
> "renesas,r9a09g047e57", "renesas,r9a09g047";
> +
> + usd_vdd_3p3v: regulator-usd-vdd-3p3v {
> + compatible = "regulator-fixed";
> + regulator-name = "fixed-3.3V";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +
> + vqmmc_sdhi1_ext: regulator-vqmmc-sdhi1-ext {
> + compatible = "regulator-gpio";
> +
> + regulator-name = "SDHI1 VccQ";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <3300000>;
> +
> + gpios = <&pinctrl RZG3E_GPIO(1, 5) GPIO_ACTIVE_HIGH>;
> +
> + gpios-states = <0>;
> + states = <3300000 0>, <1800000 1>;
> + };
> };
>
> &pinctrl {
> @@ -23,9 +53,44 @@ scif_pins: scif {
> pins = "SCIF_TXD", "SCIF_RXD";
> renesas,output-impedance = <1>;
> };
> +
> + sd1-pwr-en {
> + gpio-hog;
> + gpios = <RZG3E_GPIO(1, 6) GPIO_ACTIVE_HIGH>;
> + output-high;
> + line-name = "sd1_pwr_en";
> + };
> +
> + sdhi1_pins: sd1 {
> + sd1-cd {
> + pinmux = <RZG3E_PORT_PINMUX(1, 4, 8)>; /* SD1CD */
> + };
> +
> + sd1-data {
> + pinmux = <RZG3E_PORT_PINMUX(G, 2, 1)>, /* SD1DAT0 */
> + <RZG3E_PORT_PINMUX(G, 3, 1)>, /* SD1DAT1 */
> + <RZG3E_PORT_PINMUX(G, 4, 1)>, /* SD1DAT2 */
> + <RZG3E_PORT_PINMUX(G, 5, 1)>; /* SD1DAT3 */
> + };
> +
> + sd1-ctrl {
> + pinmux = <RZG3E_PORT_PINMUX(G, 0, 1)>, /* SD1CLK */
> + <RZG3E_PORT_PINMUX(G, 1, 1)>; /* SD1CMD */
> + };
> + };
> };
>
> &scif0 {
> pinctrl-0 = <&scif_pins>;
> pinctrl-names = "default";
> };
> +
> +&sdhi1 {
> + pinctrl-0 = <&sdhi1_pins>;
> + pinctrl-1 = <&sdhi1_pins>;
> + pinctrl-names = "default", "state_uhs";
> +
> + vmmc-supply = <&usd_vdd_3p3v>;
> + vqmmc-supply = <&vqmmc_sdhi1_ext>;
> + /delete-node/ vqmmc_regulator;
> +};
> diff --git a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
> index e378d55e6e9b..ec79452393b0 100644
> --- a/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
> +++ b/arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
> @@ -16,9 +16,18 @@ chosen {
>
> aliases {
> serial3 = &scif0;
> + mmc1 = &sdhi1;
> };
> };
>
> &scif0 {
> status = "okay";
> };
> +
> +&sdhi1 {
> + bus-width = <4>;
> + sd-uhs-sdr50;
> + sd-uhs-sdr104;
> +
> + status = "okay";
> +};
> --
> 2.43.0
>
Reviewed-by: Tommaso Merciai <tommaso.merciai.xr@xxxxxxxxxxxxxx>
